JP2017190438A - Sealant film, multilayer film, and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealant film excellent in antifogging properties in a wide temperature range, transparency, and heat sealability, and to provide a multilayer film and a package.SOLUTION: The sealant film is mainly composed of an ethylenic polymer having a melting point of 60-130°C as measured at a temperature rising rate of 10°C/min in differential scanning calorimetry and further contains 0.1-5.0 mass% of a monoglycerol fatty acid ester (A) having a melting point of 40°C or lower, 0.1-5.0 mass% of a diglycerol fatty acid ester (B) having a melting point of 40°C or lower, and 0.1-5.0 mass% of an ethylene oxide adduct (C) having a hydrophile-lipophile balance (HLB) of 10 or more. The total amount of (A) and (B) is 1-10 mass%.SELECTED DRAWING: None

Description

  The present invention relates to a sealant film. Specifically, the present invention relates to a sealant film, a multilayer film, and a package that are excellent in antifogging property in a wide temperature range and excellent in transparency and heat sealability.

  Films with excellent transparency are widely used for food packaging, particularly for fresh foods such as meat, fresh fish, and fruits, and for boiled and retort foods. With the expansion of the market and diversification of consumer needs, there are various properties such as food packaging film, transparency that allows the contents to be visible when stored as containers, oxygen and water vapor barrier properties, impact resistance, and heat resistance. Required. Above all, the required level of anti-fogging property against the adhesion of water droplets on the inner surface of the packaging film when it is packed with moisture and heated with a microwave oven, boil, retort, etc., or condensation on the inner surface of the container when stored refrigerated Is very expensive.

  After the food is packaged with a film and the packaging film is sealed by heat sealing or the like, for example, boil and retort treatment are performed, and the product as a content is stored for a long time. From the viewpoint of food quality control, these packaging films mainly use polyamide resins with excellent gas barrier properties, polyolefin resins with excellent moisture resistance, and polyester resins with excellent fragrance retention properties. The inner layer is provided with a heat-sealable sealant film layer. The sealant film layer is required to have high hermeticity when a package is formed. On the other hand, since the package is finally opened by the customer, it has both easy opening properties (easy peel properties). Is required. In particular, in the food packaging field, the film is required to have high transparency so that the contents can be easily visually confirmed. In addition, as described above, recently, food packages are increasingly demanded for content visibility in a high temperature environment in addition to content visibility at room temperature and low temperature.

  Research on techniques for imparting antifogging properties to films has been extensively conducted. For example, Patent Document 1 includes (1) a diglycerin fatty acid ester having a carbon number composition of 16-18, (2) a sorbitan fatty acid mono (di) ester having a carbon number composition of 12-18, and / or (3) ethylene, Alternatively, a polyolefin resin excellent in antifogging durability and antistatic properties, in which a predetermined amount of a polyoxyalkylene sorbitan fatty acid ester to which propylene oxide is added is added to the polyolefin is disclosed.

Patent Document 2 discloses, as a composition particularly excellent in low-temperature antifogging property, an antifogging agent selected from the group consisting of a glycerin fatty acid ester and a sorbitan fatty acid ester, and a polyoxyethylene alkyl ether with respect to a polyolefin resin. A polyolefin resin composition for food packaging containing a predetermined amount is disclosed. Patent Document 3 discloses a surfactant composed of a hydrocarbon resin and a diglycerin fatty acid ester having 8 to 22 carbon atoms and a surfactant derived from ethylene oxide as a composition having excellent antifogging properties. A resin composition containing a fixed amount is disclosed.
As described above, various studies have been made on the anti-fogging property at normal temperature or low temperature and its sustainability. However, in a high temperature environment, particularly in a temperature region where steam is generated. A technique capable of obtaining anti-fogging properties in the field has not been studied.

JP-A-11-302462 Japanese Patent Laid-Open No. 2002-020553 JP 2002-294083 A

  This invention is made | formed in view of the said subject, and the objective of this invention is providing the sealant film excellent in anti-fogging property in the wide temperature range, and excellent in transparency and heat seal property.

  As a result of intensive studies, the inventors of the present invention include a predetermined monoglycerin fatty acid ester, diglycerin fatty acid ester, and an ethylene oxide adduct in the ethylene-based polymer, thereby providing antifogging properties in a wide temperature range, and The present inventors have found that a film excellent in balance between heat sealability and transparency can be obtained, and have completed the present invention.

  That is, the problem of the present invention is that an ethylene polymer having a melting point of 60 to 130 ° C. measured at a heating rate of 10 ° C./min in differential scanning calorimetry as a main component, and (A) a monomer having a melting point of 40 ° C. or less. 0.1-5% by mass of glycerin fatty acid ester, (B) 0.1-5% by mass of diglycerin fatty acid ester having a melting point of 40 ° C. or less, and (C) ethylene having a lipophilic hydrophilic balance (HLB) of 10 or more. The solution is solved by a sealant film containing 0.1 to 5% by mass of an oxide adduct and the total amount of (A) and (B) being 1 to 10% by mass.

  According to the present invention, the room temperature is, of course, excellent in anti-fogging properties at low temperature storage in a refrigerator or the like, or even in a high temperature environment when boiled or retorted, and has transparency, heat sealability, and easy peel properties. In addition, an excellent sealant film can be obtained, and can be suitably used as a sealant layer of a packaging film.

  Hereinafter, the sealant film of the present invention (hereinafter referred to as “the present film”) as an example of the embodiment of the present invention will be described. However, the scope of the present invention is not limited to the embodiments described below.

<Ethylene polymer>
Specific examples of the ethylene polymer used in the film include ultra-low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-propylene copolymer, ethylene-1-butene copolymer, and ethylene. Ethylene such as -4-methyl-1-pentene copolymer, ethylene-1-hexene copolymer, ethylene-1-octene copolymer, ethylene-1-decene copolymer, and α having 3 to 18 carbon atoms -Copolymers with olefins, ethylene-vinyl acetate copolymers, ethylene- (meth) acrylic acid ester copolymers, ethylene- (meth) acrylic acid copolymers, ethylene-conjugated dienes (eg butadiene and isoprene) Examples thereof include a polymer and an ethylene-nonconjugated diene copolymer. Among these, low-density polyethylene, ethylene / α-olefin copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid ester copolymer, and the like are preferably used. By using these as main components, the compatibility with the antifogging agent is excellent, and the heat sealability and transparency of the film are excellent. In addition, an ethylene-type polymer may be used independently and may be used in mixture of 2 or more types.

It is important that the ethylene polymer used in this film has a melting point measured in a differential scanning calorimetry at a heating rate of 10 ° C./min in the range of 60 to 130 ° C. The lower limit of the melting point is preferably 70 ° C or higher, more preferably 80 ° C or higher. As an upper limit, it is preferable that it is 125 degrees C or less, and 120 degrees C or less is more preferable. If the melting point is within the above range, the film has heat resistance and excellent heat sealability.
The melting point is a crystal melting peak temperature when measured with a differential scanning calorimeter at a heating rate of 10 ° C./min according to JIS K7121.

The density of the ethylene-based polymer used in the present invention is preferably 0.900 to 0.950 g / cm ³ . If it is this range, processability, such as drawdown property, draw resonance, stretchability, can be stably maintained.

  The MFR of the ethylene polymer used in the present invention is preferably 0.5 to 20 g / 10 minutes, more preferably 1.5 to 10 g / 10 minutes. If it is this range, moldability will be favorable and manufacture of a film, a sheet, etc. will be easy.

  In addition to the ethylene polymer which is a main component, the present film may be blended with another resin as needed as long as the effects of the present invention are not impaired. Specific examples of other resins include propylene-based resins such as propylene homopolymers and propylene / α-olefin copolymers, styrene resins, vinyl chloride resins, polyester resins, polycarbonate resins, polyamide resins, and polyacetals. Resin, polyethylene oxide resin, cyclic olefin resin, polyurethane resin, silicone resin and the like.

<(A) Monoglycerin fatty acid ester>
It is important that the monoglycerin fatty acid ester used in this film has a melting point of 40 ° C. or lower. Furthermore, it is desirable that it is in a liquid state at room temperature.
If it is the said monoglycerin fatty acid ester, when high temperature vapor | steam touches a film, an antifogging agent can transfer to a film surface rapidly, and initial stage antifogging property can be expressed. Further, even if the film is stored for a long time in a room temperature environment, the antifogging agent solid component does not precipitate and long-term antifogging maintenance can be expected. Also, the transparency and heat sealability of the film are excellent.
The melting point is a crystal melting peak temperature when measured with a differential scanning calorimeter at a heating rate of 10 ° C./min according to JIS K7121.

The monoglycerin fatty acid ester is obtained by an esterification reaction of monoglycerin and a fatty acid.
Specific examples of fatty acids constituting monoglycerin fatty acid esters include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecylic acid, lauric acid, tridecylic acid, Saturation of myristic acid, pentadecylic acid, palmitic acid, margaric acid, stearic acid, 12-hydroxystearic acid, nonadecyl acid, arachidic acid, heicosyl acid, behenic acid, tricosylic acid, lignoceric acid, serotic acid, montanic acid, melicic acid Fatty acids, α-linolenic acid, stearidonic acid, eicosapentaenoic acid, docosapentaenoic acid, docosahexaenoic acid, linoleic acid, γ-linolenic acid, dihomo-γ-linolenic acid, arachidonic acid, docosapentaenoic acid, palmitoleic acid, vaccenic acid , Paulic acid, oleic acid And unsaturated fatty acids such as elaidic acid, erucic acid, nervonic acid, and sapienoic acid. Of these, saturated or unsaturated fatty acids having 12 to 20 carbon atoms are preferably used. These fatty acids may be used alone or in combination of two or more.

  Specific examples of commercially available monoglycerin fatty acid esters include, for example, Riquemar OL-100E (monoglycerin oleate) and Poem OL-200V (monoglycerin monodiolate) manufactured by Riken Vitamin Co., Ltd., and Rheodor MO manufactured by Kao Corporation. -60 (monoglycerol monooleate) and the like.

<(B) Diglycerin fatty acid ester>
It is important that the diglycerin fatty acid ester used in this film has a melting point of 40 ° C. or less. Furthermore, it is desirable that it is in a liquid state at room temperature.
If it is the above-mentioned diglycerin fatty acid ester, when the content containing moisture is sealed with this film and stored in a refrigerated environment of 0 to 10 ° C., the antifogging agent quickly shifts to the film surface. Sex can be expressed. Further, even if the film is stored for a long time in a room temperature environment, the antifogging agent solid component does not precipitate and long-term antifogging maintenance can be expected. Furthermore, by using together with the ethylene oxide adduct whose HLB mentioned later is 10 or more, the wettability of the surface is further improved, and the antifogging property is improved.
The melting point is a crystal melting peak temperature when measured with a differential scanning calorimeter at a heating rate of 10 ° C./min according to JIS K7121.

  Diglycerin fatty acid ester is obtained by esterification reaction of diglycerin and fatty acid. Specific examples of the fatty acid constituting the diglycerin fatty acid ester are the same as those listed as examples of the fatty acid constituting the monoglycerin fatty acid ester, and among them, a saturated or unsaturated fatty acid having 12 to 20 carbon atoms is preferable. Used. These fatty acids may be used alone or in combination of two or more.

  Specific examples of the commercially available diglycerin fatty acid ester include Riquemar O-71D (diglycerin oleate) and Riquemar L-71D (diglycerin laurate) manufactured by Riken Vitamin Co., Ltd., and MCA- manufactured by Sakamoto Pharmaceutical Co., Ltd. 150 (diglycerin caprylate).

<(C) Ethylene oxide adduct>
It is important that the ethylene oxide adduct used for the film is an ethylene oxide adduct having a lipophilic-lipophilic balance (HLB) of 10 or more. The HLB is preferably 11 or more, more preferably 12 or more. If HLB is the said range, hydrophilicity will become enough and the surface tension with the water in the film surface can be lowered | hung. When the surface tension is lowered, water droplets on the film surface become a film shape, and the antifogging property can be improved. Further, when an ethylene oxide adduct of HLB in the above range and (A) monoglycerin fatty acid ester or (B) diglycerin fatty acid ester having an HLB of 10 or less are used, an olefin copolymer of an ethylene oxide adduct Since the affinity for the resin is increased, the migration of the antifogging agent to the film surface is facilitated, and the antifogging property is further improved by a synergistic effect.

  The ethylene oxide adduct is a compound obtained by adding ethylene oxide to alcohol, fatty acid, esters thereof, fats and oils, and is generally known as a nonionic surfactant. The desired HLB is adjusted by adjusting the chain length of the polymerized portion of ethylene oxide. Specific examples of the ethylene oxide adduct include polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester and the like. Specific examples of the polyoxyethylene sorbitan fatty acid ester and the fatty acid constituting the polyoxyethylene fatty acid ester are the same as those listed as examples of the fatty acid constituting the monoglycerin fatty acid ester, and among them, the number of carbon atoms is 12 to Twenty saturated or unsaturated fatty acids are preferably used. These fatty acids may be used alone or in combination of two or more.

  Specific examples of commercially available products of the above-mentioned ethylene oxide adducts include Rikenmar O-852 (polyoxyethylene sorbitan trioleate) manufactured by Riken Vitamin Co., Ltd., Riquemar B-205 (polyoxyethylene alkyl ether), manufactured by Kao Corporation. Rhedol TW series (polyoxyethylene sorbitan fatty acid ester) and Emanone series (polyoxyethylene fatty acid ester).

<Contents of (A), (B), (C)>
The content of each component in this film is (A) 0.1-5 mass% of monoglycerin fatty acid ester, (B) 0.1-5 mass% of diglycerin fatty acid ester, and (C) ethylene oxide adduct. It is important that the content is 0.1 to 5% by mass, and the total amount of (A) and (B) is 1 to 10% by mass.
The content of (A) is preferably 0.5% by mass or more, and more preferably 1% by mass or more, as the lower limit. The upper limit is preferably 4% by mass or less, and more preferably 3% by mass or less.
The lower limit of the content of (B) is preferably 0.5% by mass or more, and more preferably 1% by mass or more. The upper limit is preferably 4% by mass or less, and more preferably 3% by mass or less.
The lower limit of the content of (C) is preferably 0.5% by mass or more, and more preferably 1% by mass or more. The upper limit is preferably 4% by mass or less, and more preferably 3% by mass or less.
By making these contents in the film within the above range, it is possible to obtain a film having anti-fogging properties at room temperature, low temperature and high temperature, and excellent heat sealability and transparency. Become.

  Further, the total amount of (A) and (B) is preferably 1.5% by mass or more, and more preferably 2% by mass or more as a lower limit. As an upper limit, it is preferable that it is 8 mass% or less, and it is more preferable that it is 6 mass% or less. If the lower limit of the total amount of (A) and (B) is within the above range, sufficient antifogging properties can be obtained. If the upper limit is within the above range, film formation is not difficult, and transparency due to excessive bleed out, deterioration of the film appearance, deterioration of heat sealability, etc. do not occur.

<Other ingredients>
The film may contain other additives as long as the properties are not impaired. Examples of additives include colorants, inorganic fillers, organic fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, lubricants, hydrolysis inhibitors, antistatic agents, plasticizers, and flame retardants. Can be mentioned. The addition amount of these additives is not particularly limited, and can be appropriately determined within a range that does not hinder the desired physical properties of the present invention.

<Method for producing this film>
This film can be manufactured as a single layer film and can be used as a single layer. However, since a sealant film is generally used as a sealant layer of a multilayer film, it is manufactured as a multilayer film having a sealant layer. May be.

  The method for producing the single layer film is not particularly limited, and specific examples include a T-die method and an inflation method. As a method for producing a multilayer film, for example, an extrusion casting method using a T-die or an inflation method may be used to form a multilayer film by coextrusion using a feed block method, a multi-manifold die, or a combination thereof, After each is manufactured as a single layer film, it may be laminated by dry lamination method, wet lamination method, sand lamination method, thermal lamination method, etc., and may be laminated into other films by extrusion lamination method. It is good also as a multilayer film by doing. When laminating, various adhesives such as an anchor coat agent, a urethane adhesive, an acrylic adhesive, and a polyester adhesive can be used as necessary. Further, if necessary, stretching treatment such as longitudinal stretching by a roll method, sequential biaxial stretching by a tenter method, or simultaneous biaxial stretching can also be performed.

  In the case of a multilayer film, the layer structure is not particularly limited as long as it has a sealant layer made of this film in at least one outermost layer. In view of various required characteristics such as oxygen / water vapor barrier properties, impact resistance, and pinhole resistance, various resin layers such as polyolefin resin layers, polyester resin layers, polyamide resin layers, adhesive layers, vapor deposition layers, A multilayer film having a printed layer, an antistatic layer, and the like can be obtained. Among these, a multilayer film with a polyester resin layer and a polyamide resin layer is particularly preferable.

  Furthermore, for the present film or multilayer film having a sealant layer made of the present film, an adhesive layer or an antistatic layer is formed on the surface of various resin layers by a known coating method, vapor deposition method or printing method, if necessary. A vapor deposition layer, a printing layer, or the like may be provided.

<Thickness of this film>
The thickness of this film becomes like this. Preferably it is 10-100 micrometers, More preferably, it is 15-50 micrometers. If the thickness of this film is 10 μm or more, the strength as a sealant is sufficient. Moreover, if it is 100 micrometers or less, the fall of heat seal intensity | strength does not occur and it is preferable.

<Anti-fogging property (low temperature)>
In this film, 10 mL of distilled water (20 to 25 ° C.) is placed in a polypropylene cylindrical container having a bottom diameter of 50 mm and a depth of 80 mm, the film is in contact with the container, and the opening of the container is covered with the film. Even when sealed and packaged and stored in a refrigerator at 2 to 10 ° C. for 24 hours, the contents can be clearly confirmed without condensation on the film surface. Moreover, even if moisture condenses on the film surface, the water film does not have a lens shape, and the contents can be confirmed uniformly and clearly. That is, this film is a film excellent in low-temperature antifogging properties.

<Anti-fogging property (high temperature)>
Immediately after putting 100 mL of hot water (90-95 ° C.) into a polypropylene cylindrical container having a bottom diameter of 50 mm and a depth of 80 mm, this film is sealed with the opening of the container and packaged. Even when it is allowed to stand for 10 seconds, the contents can be clearly confirmed without water vapor condensing on the film surface. Moreover, even if moisture condenses on the film surface, a uniform water film is formed without forming a lens shape, so that the contents can be clearly confirmed. That is, this film is excellent in initial antifogging property against high temperature steam.

<Transparency>
The transparency of the film is preferably 88% or more in terms of the total light transmittance of the film having a thickness of 20 μm as measured in accordance with JIS K7136, from the viewpoint of design properties, contents visibility, and the like. % Or more is more preferable. The upper limit of the total light transmittance is not particularly limited, and is preferably as high as possible. Similarly, the total haze value measured is preferably 10% or less, and more preferably 5% or less. The lower limit of the total haze value is not particularly limited, and is preferably as small as possible. If the total light transmittance and the total haze value are within such ranges, the film is excellent in transparency, and the contents can be visually recognized when used as a food packaging film.

<Wettability>
As for the wettability of the film, 23 ° C. distilled water is dropped onto the film, and the contact angle value after 20 seconds is preferably 30 ° or less, and more preferably 20 ° or less. In addition, the minimum of the value of a contact angle is not specifically limited, The smaller one is preferable. If the value of a contact angle with the distilled water dripped on this film is 30 degrees or less, it can be said that this film is a film excellent in surface wettability.

<Heat sealability>
This film exhibits excellent heat sealability. For example, when the layer which consists of this film is piled up and heat-sealed at the bonding temperature of 150 degreeC under room temperature (23 degreeC), it has favorable sealing performance. In this case, the heat seal strength as the maximum stress in the 180 degree peel test measured at a peel rate of 200 mm / min is preferably 3 N / 15 mm or more, and more preferably 5 N / 15 mm or more.

<Use of this film>
This film has excellent anti-fogging properties in a wide range of temperatures at normal temperature, low temperature, and high temperature, and is excellent in transparency and heat sealability. Therefore, it is suitable as a sealant for various packaging films, especially food packaging films. Can be used.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not restrict | limited by the following Example.

<Evaluation method>
The samples obtained in Examples and Comparative Examples were measured and evaluated by the following methods, and the results are shown in Table 1.

(1) Transparency Based on JIS K7136, the total light transmittance and the total haze value of the film at a thickness of 20 μm were measured. A sample having a total light transmittance of 88% or more and a total haze value of 10% or less was regarded as acceptable.

(2) Wettability In a 23 degreeC atmosphere, the value of the contact angle of this film and distilled water was measured. A film having a contact angle value of 30 ° or less between the film and distilled water was regarded as acceptable.

(3) Anti-fogging property (low temperature)
10 mL of water (23 ° C.) is placed in a PP container having a length of 50 mm, a width of 50 mm, a depth of 80 mm, and then the film is packaged using a sample so as to seal the opening of the container, and the temperature is set to 3 ° C. The film was stored in a tank for 24 hours, and the degree of haze on the film surface after storage was evaluated according to the following criteria.
A: The contents can be clearly confirmed.
○: Water does not condense on the film surface, and the contents can be confirmed.
Δ: Moisture is condensed on the film surface, making it difficult to confirm the contents.
X: Water becomes fine water droplets on the film surface, and the contents cannot be confirmed.

(4) Anti-fogging property (high temperature)
Put 100 mL of hot water (90-95 ° C.) into a PP container 50 mm long, 50 mm wide, and 80 mm deep, and then package the film using a sample so as to seal the opening of the container, 10 seconds later The degree of haze was evaluated according to the following criteria.
A: The contents can be clearly confirmed.
○: Water does not condense on the film surface, and the contents can be confirmed.
Δ: Moisture is condensed on the film surface, making it difficult to confirm the contents.
X: Water becomes fine water droplets on the film surface, and the contents cannot be confirmed.

(5) Heat-sealing properties Each film is cut into a strip shape having a length of 100 mm and a width of 15 mm, and one end of each short side is set at a set temperature of 150 ° C. and 2 kg using a heat-sealing machine at room temperature (23 ° C.). The test piece was obtained by heat sealing at / cm 2 for 2 seconds. About this test piece, with the heat seal portion at the center, both ends are attached to both grips of a tensile tester, tensile stress is applied until it breaks at a peeling angle of 180 degrees and a peeling speed of 200 mm / min, and the maximum stress is heated. It was set as the sealing strength, and the one having a heat sealing strength of 3 N / 15 mm or more was regarded as acceptable.

<Materials used>
(Ethylene polymer)
PO-1: Low density ethylene (LDPE), Ube Maruzen polyethylene, UBE polyethylene R500 (melting point: 110.4 ° C.)
PO-2: ethylene-vinyl acetate copolymer (EVA), manufactured by Mitsui DuPont Polychemical, EVAFLEX EV260 (VA content: 28 wt%, melting point: 72.0 ° C.)
PO-3: ethylene- (meth) acrylic acid methyl copolymer (EMMA), manufactured by Yashara Chemical, Hirodine EXP 7509 (MMA content: 7 wt%, melting point: 95.4 ° C.)

(A) Monoglycerol fatty acid ester MG-1: Monoglycerol monodiolate: manufactured by Riken Vitamin Co., Ltd., Poem OL-200V (melting point: 24 ° C., HLB: 3.1)
MG-2: Monoglycerin monostearate: Rikenmar S-100 manufactured by Riken Vitamin Co., Ltd. (melting point: 67 ° C., HLB: 4.3)
(B) Diglycerin fatty acid ester DG-1: Diglycerin oleate: Riken Vitamin Co., Ltd., Riquemar O-71D (liquid, HLB: 5.7)
DG-2: Diglycerin laurate: manufactured by Riken Vitamin Co., Ltd., Riquemar L-71D (melting point: 34 ° C., HLB: 7.3)
DG-3: Diglyceryl stearate: Riken Vitamin Co., Ltd., Riquemar S-71D (melting point: 61 ° C., HLB: 5.7)
(C) Ethylene oxide adduct EO-1: Polyoxyethylene sorbitan trioleate: Riken Vitamin Co., Ltd., Riquemar O-852 (liquid, HLB: 11.0)
EO-2: polyoxyethylene alkyl ether: manufactured by Riken Vitamin Co., Ltd., Riquemar B-205 (liquid, HLB: 12.0)

Example 1
PO-1, MG-1, DG-1 and EO-1 were weighed at a mixing mass ratio of 96: 1: 2: 1, and these were weighed with a laboratory plast mill manufactured by Toyo Seiki Seisakusho at a test temperature of 200 ° C. and a rotation speed of 80 rpm. After kneading for 5 minutes under the above conditions, a film having a thickness of 20 μm was obtained between PET films while pressing with a metal roll and a rubber roll using a laminator apparatus set so that the roll temperature was 200 ° C. Thereafter, the PET film was peeled off and evaluated. The results are shown in Table 1.

(Example 2)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, DG-1, and EO-1 were weighed at a mixing mass ratio of 94: 1: 4: 1. The results are shown in Table 1.

(Example 3)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, DG-1, and EO-1 were weighed at a mixing mass ratio of 96: 2: 1: 1. The results are shown in Table 1.

Example 4
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, DG-2, and EO-1 were weighed at a mixing mass ratio of 96: 1: 2: 1. The results are shown in Table 1.

(Example 5)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, DG-1 and EO-2 were weighed at a mixing mass ratio of 96: 1: 2: 1. The results are shown in Table 1.

(Example 6)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-2, MG-1, DG-1 and EO-2 were weighed at a mixing mass ratio of 96: 1: 2: 1. The results are shown in Table 1.

(Example 7)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-3, MG-1, DG-1 and EO-2 were weighed at a mixing mass ratio of 96: 1: 2: 1. The results are shown in Table 1.

(Comparative Example 1)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, and DG-1 were weighed at a mixing mass ratio of 95: 1: 4. The results are shown in Table 2.

(Comparative Example 2)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, DG-1, DG-3, and EO-1 were weighed at a mixing mass ratio of 94: 4: 1: 1. . The results are shown in Table 2.

(Comparative Example 3)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-1, DG-3, and EO-1 were weighed at a mixing mass ratio of 94: 4: 1: 1. . The results are shown in Table 2.

(Comparative Example 4)
A film was prepared and evaluated in the same manner as in Example 1 except that PO-1, MG-2, DG-3, and EO-1 were weighed at a mixing mass ratio of 94: 4: 1: 1. . The results are shown in Table 2.

  The films described in Examples from Table 1 were excellent in film surface wettability, antifogging properties, transparency, and heat sealability. On the other hand, the film described in the comparative example was not satisfactory with respect to at least one of surface wettability, antifogging property, and heat sealability. From this, it can be seen that this film has anti-fogging properties in a wide temperature range and is excellent in transparency and heat sealability.

  This film is excellent in anti-fogging property in a wide temperature range at normal temperature, low temperature, and high temperature, and is excellent in transparency and heat sealability, so it can be suitably used as a sealant for food packaging films, for example. .

Claims (6)

  The main component is an ethylene polymer having a melting point of 60 to 130 ° C. measured at a heating rate of 10 ° C./min in differential scanning calorimetry, and (A) a monoglycerin fatty acid ester 0.1 having a melting point of 40 ° C. or less. -5 mass%, (B) 0.1-5 mass% of diglycerin fatty acid ester having a melting point of 40 ° C. or less, and (C) an ethylene oxide adduct having a lipophilic hydrophilic balance (HLB) of 10 or more 0.1 A sealant film containing ˜5% by mass, and the total amount of (A) and (B) is 1 to 10% by mass.   The ethylene polymer is one or more selected from low density polyethylene, ethylene / α-olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene- (meth) acrylic ester copolymer. The sealant film according to claim 1, wherein the sealant film is provided.   The sealant film according to claim 1 or 2, wherein (A) comprises monoglycerol and a monoester or diester of a saturated or unsaturated fatty acid having 12 to 20 carbon atoms.   The sealant film according to any one of claims 1 to 3, wherein (B) comprises diglycerol and a monoester or diester of a saturated or unsaturated fatty acid having 12 to 20 carbon atoms.   A multilayer film comprising the sealant layer according to claim 1 as at least one outermost layer.   A package using the multilayer film according to claim 5.